Inexpensive ESP32/ESP8266 programmer
This device implements a USB programmer for ESP32/ESP8266 devices with traditional programming pin management (EN/BOOT0) using RTS DTR bridge.
It also differs from traditional USB-UART converters by a powerful LDO, which allows you to easily power the ESP32 / ESP8266 and related peripherals. Design is verified in hardware, the device was ordered from JLCPCB and tested in the real world for programming various devices. (Gerbers, BOM and CPL included)